4-9. GENERAL MAINTENANCE PROCEDURES - Continued
4-9.1 General Removal and Disassembly Instructions - Continued
Lifting Truck - Continued
Place 10 ton hydraulic jack beneath differential. Raise the jack until tires clear the ground.
Place maintenance trestles beneath axle, one on each side of differential. If truck is to be supported by
frame, and tires still need to clear the ground, raise the truck high enough to compensate for leaf spring sag.
Carefully lower truck onto maintenance trestles. Be sure maintenance trestles are adjusted to the same
height and are of sufficient capacity to carry truck weight.
Repeat steps 4 thru 6 to raise other axle.
Lowering The Truck
Place 10 ton hydraulic jack beneath differential. Raise the jack until all weight is off maintenance trestles.
Remove maintenance trestles from beneath axle (one on each side of differential).
Carefully and slowly, lower jack until all weight is removed from jack immediately after truck is grounded,
chock the wheels.
Repeat step 1 thru 3 to lower other axle as necessary.
Ensure gear selector is positioned to N (neutral) and parking brakes are applied, then remove all wheel
Identify all parts of similar shape with tags. This will make proper reassembly easier. Be sure to identify ends of
electric, hydraulic, and air lines as they are disconnected.
Some assemblies that are removed, even though defective, shall be treated as valuable items . They may be
rebuilt for future use.
Whenever possible, all gaskets, packings, and seals shall be discarded during removal or disassembly. Similarly,
lock wire, lockwashers, cotter pins, and like items shall be discarded during disassembly. All should be replaced
during assembly. When removing seals, gaskets, or packings, take care not to damage (e.g. scratch) the sealing
surfaces if surfaces are damaged they must be repolished to give a good sealing surface.
To prevent moisture and dirt from entering housings, lines, and other openings, apply protective covers after
disassembly. Wrap all parts in clean paper or dip parts in rust preventive oil.